Behavioural and neurophysiological aspects of sexual imprinting in zebra finches
Behavioural and neurophysiological aspects of sexual imprinting in zebra finches
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DOI：
10.1016/s0166-4328(98)00093-x
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发表时间：
1999-02-01
影响因子：
2.7
通讯作者：
Rollenhagen, A
中科院分区：
文献类型：
--
作者：
Bischof, HJ;Rollenhagen, A
性印记被定义为年轻动物学习其未来性伴侣特征的过程。这是一个两阶段的过程，包括一个习得期，在此期间学习社会环境的特征，以及一个稳定化过程，在此过程中，在先前获得的社会信息的指导下，建立并稳定对性伴侣的偏好，以便随后不能再次改变。稳定过程很短（1小时），可以通过实验控制。这允许设计实验来检查伴随着印记过程的生理事件。在稳定过程中，前脑的四个区域比其他任何行为环境都更活跃。这些是副/背侧上纹状体（HAD）、原始新纹状体尾侧（ANC）、内侧新/上纹状体（MNH）和外侧新/上纹状体（LNH）。发育过程中的隔离降低了HAD和ANC中神经元的棘密度，并增强了MNH和LNH中的棘密度。随后暴露于女性（其在行为实验中稳定先前获得的偏好）1周导致HAD和ANC中的脊柱密度增强，以及MNH和LNH减少。HAD和ANC的增强在暴露于雌性动物后的第二个隔离期是可逆的，MNH和LNH的减少则不是。这种不可逆性表明MNH和LNH内的还原过程可能是印迹过程的解剖学表现。在两个实验之后，对四个脑区的棘密度的检查证实了这一想法，这两个实验先前已经表明会影响行为实验中的稳定过程。(C)1999 Elsevier Science B. V.保留所有权利。
Sexual imprinting has been defined as the process by which young animals learn the characteristics of their future sexual partners. It is a two stage process including an acquisition period where features of the social environment are learnt, and a stabilization process by which, under the guidance of the previously acquired social information, a preference for a sexual partner is established and stabilized, so that it cannot be altered again subsequently. The stabilization process is short (1 h) and can be controlled experimentally. This allows for the design of experiments to examine the physiological events accompanying the imprinting process. During the stabilization process, four areas of the forebrain are more activated than in any other behavioural context. These are the hyperstriatum accessorium/dorsale (HAD), the archi-neostriatum caudale (ANC), the medial neo/hyperstriatum (MNH) and the lateral neo/hyperstriatum (LNH). Isolation during development reduces the spine density of neurons in HAD and ANC and enhances it in MNH and LNH. Subsequent exposure to a female (which stabilizes the previously acquired preference in behavioural experiments) for 1 week leads to an enhancement of spine densities in HAD and ANC, and to a reduction in MNH and LNH. The enhancement in HAD and ANC is reversible by a second isolation period after the exposure to a female, the reduction within MNH and LNH is not. This irreversibility indicates that the reduction process within MNH and LNH may be the anatomical manifestation of the imprinting process. The examination of spine densities in the four brain areas after two experiments which have been shown previously to affect the stabilization process in behavioural experiments, confirms this idea. (C) 1999 Elsevier Science B.V. All rights reserved.